Cook pasta as directed on package, omitting salt.,Meanwhile, cook chicken in large nonstick skillet on medium-high heat 5 to 7 min.,or until done, stirring occasionally.,______,Mix flour and broth in same skillet with whisk.,Stir in Neufchatel, 2 Tbsp.,Parmesan, garlic powder and pepper; cook 2 min.,or until mixture boils and thickens, stirring constantly.,Stir in chicken.,Drain pasta; place in large bowl.,Add chicken mixture; toss to coat.,Sprinkle with remaining Parmesan.